Stool



FIG. 1 is a perspective view of the design of the present invention for a stool;

FIG. 2 is a front elevation view of the stool of FIG. 1;

FIG. 3 is a rear elevation view of the stool of FIG. 1;

FIG. 4 is a right side elevation view of the stool of FIG. 1, the left side being a mirror image;

FIG. 5 is a top end view of the stool of FIG. 1; and,

FIG. 6 is a bottom end view of the stool of FIG. 1.

The broken lines showing of the foot rests are for illustrative purposes only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a stool, as shown and described. 